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Variable friction secondary seal for face sealsVibration and stability of a primary seal ring is controlled by a secondary seal system. An inflatable bladder which forms a portion of the secondary seal varies the damping applied to this seal ring. The amplitude of vibration of the primary seal ring is sensed with a proximity probe that is connected to a microprocessor in a control system. The bladder pressure is changed by the control system to mitigate any sensed instability or vibration.
Document ID
19860016318
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Dirusso, E. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 12, 2013
Publication Date
April 8, 1986
Subject Category
Mechanical Engineering
Accession Number
86N25790
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-LEW-14170-1|US-PATENT-4,580-791
Patent Application
US-PATENT-APPL-SN-672224

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